16817871923 has 4 divisors (see below), whose sum is σ = 17272409040. Its totient is φ = 16363334808.

The previous prime is 16817871913. The next prime is 16817871937. The reversal of 16817871923 is 32917871861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16817871923 - 2¹² = 16817867827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16817871913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227268503 + ... + 227268576.

It is an arithmetic number, because the mean of its divisors is an integer number (4318102260).

Almost surely, 2^16817871923 is an apocalyptic number.

16817871923 is a deficient number, since it is larger than the sum of its proper divisors (454537117).

16817871923 is an equidigital number, since it uses as much as digits as its factorization.

16817871923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454537116.

The product of its digits is 1016064, while the sum is 53.

The spelling of 16817871923 in words is "sixteen billion, eight hundred seventeen million, eight hundred seventy-one thousand, nine hundred twenty-three".